code: def is_float(v):
      return isinstance(v, float) or (
          numpy and isinstance(v, numpy.floating)
      )
  
file_path: lets-plot/python-package/lets_plot/_type_utils.py
imports: import json
  import math
  from datetime import datetime
  from typing import Dict
label_desc: Use image node_id 5 for calling a global function with example usage: is_float(v) and returns: unknown